The H∞ control problem of a class of cyber-physical system (CPS) under malicious denial-of-service (DoS) jamming attack was researched, aiming at the influence of the DoS jamming attack on the CPS. An energy constrained DoS jammer with periodic attack strategy attacks the wireless channel in the CPS, decreasing the communication quality. Random packet dropouts caused by inherent factors exist in the wireless channel, and the DoS jammer’s attack strategy is unknown due to that DoS jamming attacks have the characteristics of suddenness and concealment. By expressing the influence of malicious DoS jamming attacks and the inherent factors in the wireless channel into a unified form and establishing an attack tolerance mechanism and an observer-based control strategy, sufficient conditions were obtained to guarantee the exponential mean square stability of the attacked CPS without knowing DoS jammer’s concrete attack strategy, and the prescribed H∞ performance index can be achieved simultaneously. The design of the H∞ controller is transformed into the solving of a convex optimization problem. Numerical simulations were used to demonstrate the correctness and effectiveness of the control strategy.
Mu-feng WANG,Bu-gong XU,Li-ding CHEN. H∞ control for cyber-physical system under periodic denial-of-service jamming attack. Journal of ZheJiang University (Engineering Science), 2019, 53(11): 2146-2153.
Fig.2Schematic diagram of working cycle of DoS jammer
Fig.3Norm of states for UPS using conventional control strategy
Fig.4Norm of states for UPS using H∞ control strategy
Fig.5Time of packet dropouts under DoS jamming attack
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